Summary

Cancer is increasingly being viewed as an ecosystem, a community in which tumor cells cooperate with other tumor cells and host cells in their microenvironment. As conditions change, the ecosystem evolves and adapts to ensure the survival and growth of cancer. Our understanding of the intricate relationships in this ecosystem has led to revolutionary treatments, including immunotherapy. Successful treatment and prevention of cancer require an ecosystem, too—a coordinated unit of researchers, patients, health care professionals, health care systems, regulatory agencies, government, and industry. How can these partners work together as one interconnected community?